[(2x-1/x+1)-x+1]÷(x-2/x²+2x+1)计算
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解:
原式=[(2x-1)/(x+1)-(x-1)]×(x+1)²/(x-2)
=[(2x-1)-(x+1)(x-1)]/(x+1)×(x+1)²/(x-2)
=(2x-x²)/(x+1)×(x+1)²/(x-2)
=-x(x+1)
=-x²-x
原式=[(2x-1)/(x+1)-(x-1)]×(x+1)²/(x-2)
=[(2x-1)-(x+1)(x-1)]/(x+1)×(x+1)²/(x-2)
=(2x-x²)/(x+1)×(x+1)²/(x-2)
=-x(x+1)
=-x²-x
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展开全部
=[(2x-1)/(x+1)-(x-1)]×(x+1)²/(x-2)
=[(2x-1)-(x+1)(x-1)]/(x+1)×(x+1)²/(x-2)
=(2x-x²)/(x+1)×(x+1)²/(x-2)
=-x(x+1)
=-x²-x
=[(2x-1)-(x+1)(x-1)]/(x+1)×(x+1)²/(x-2)
=(2x-x²)/(x+1)×(x+1)²/(x-2)
=-x(x+1)
=-x²-x
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评论
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